a  >b { color: red }
a  > b { color: red }
a  >b { color: red }
a  +b { color: red }
a  + b { color: red }
a  +b { color: red }
a  ~b { color: red }
a  ~ b { color: red }
a  ~b { color: red }
a  ~b  + c  >d { color: red }
